/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/CombineMeshesTool.h
void BuildCombinedMaterialSet ( [TArray](API\Runtime\Core\Containers\TArray)< [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * > & NewMaterialsOut, [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< int32 >> & MaterialIDRemapsOut )